Thread: Quadrajet & extreme inclines

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Thanks very much, I wondered about the hot tank treatment. I have worked in metal finishing and most metals are OK in caustic tanks but Aluminum, and to a lesser extent Iron, will be etched away by both acid and basic solutions, so if there are any aluminum bushings or Al content in the white metal, hot tanking will eat that away. I burned valves on a VW due to a pinhole leak in an aftermarket intake, so a vacuum leak will degrade the Power booster and possibly lead to over lean conditions. Maybe I will just use a toothbrush scrup on the whole unit and avoid any etching. What the heck is white metal anyway, Tin, Lead, Cadmium, Antimony? Those four metals should be relatively inactive and not be etched in basic (caustic) solutions like radiator hot tanking (brass radiator). Maybe there is a hot tank solution for aluminum radiators that would be good for carbeurators too?

Don Shillady